Steam-pipe for articulated locomotives.



C. J. MBLLIN.

STEAM PIPE FOR ABTIGULATED LOCOMOTIVES;

1 9 1 9 1 r a M d 8 u n e t a P w M 1 2 N A J D E L I F N 0 I T A 0 I LP P A I 5 3 4 0 2 O P 1 2 SHEETS-SHEET 1.

q wru WITNE o. J. MELLIN. STEAM PIPE FOR ARTIGULATED LOCOMOTIVES.

APPLIOATION PILE 1) -AH.2, 1912. Patented Mar. 19

FIG. 2..-

u n-ma CARL J.

M'ELLIN, OF SCHENECTADY, NEW YORK.

STEAM-PIPE FOR .ARTICULATED LOCOMOTIVES.

Specification of Letters Patent.

Patented Mar. 19, 1912.

Application filed January 2, 1912. Serial No. 689,017.

To all ir/trmt it may color/wt Be it known that J, (Ann J. Munmx, ot

Schenectady. in the county of Schenectady and State. of New York, haveinvented a certain new and useful lmprt'ivement in Steam-Pipes torArticulated Locomotives, of which improvement the 'l'ollowing is aspecification.

My invention relates to loconu'itives of the articulated or Mallet type,more particularly these that are ctptipped with superheatcrs, and itsobject is to provide means for delivery of steam to the high pret-isurecylinders of locomotives ot such whereby the. use of the belt pipe" andthe resultant obstrutiwtion to the view ot t'zng'inecr will be avoided,and in the case of superhcater engines, connection may he made with thesitpifllltiuttll as directly as possible.

The improvement claimed is hereinafter fully set forth.

In the accompanying drawings: l*i ;ure l is a diagrammatic side view ofan articulated compound locomotive, illustrating an application of myinvention; Fig. 2, a side. view, partly in section. aml on an enlargedscale, of a portion ol the same, a transverse section through the smokebox.

My invention is herein cxcmpliticd as applied in a lizcomotive engine.of the Mallet articulated compound type, comprising a rear frame, 9.supported on a plurality of driving wheels, 1, and a l'ront t'ramc, 8,supported on a plurality ot' driving wheels, l. The rear t'rame, as inthe regular practice in locomotives of this type, carries at. its frontend, which is located nearly at the middle of the length of the boiler,a pair ot' high pressure cylinders, 12", the pistons ot' which arecoupled to tl'tlllh inn wheels, l. aml the trout pair ol low pressurecylinders, t2". the pistons ot which are coupled to crank pins on thedriving wheels. 1. 'l'hc boiler, l. is lived to the rear l'rame, ti, andthe trout and rear 'l'rames are coupled, in the longitudinal centralplane of the locomotive, by a pivot pin. 8', the l'orvvard portion ofthe boiler being. thus, as is characteristic in locomotives ol' thistype, tree to swing or traverse laterally, relatively to' the troutframe, 8, in passing curves.

in the practice of my invention, the valve chests, 12', ot' the highpressure cylinders, 12', are connected with the main steam suptype,

and, Fig. i,

1 tending rcarwardly, below the the i "any suitable and bination of aboiler, pins on' thy drtvt'rame carries a l l l ply pipe, til. whichleads from a throttle valve chamber, 42, located in the dome, ll, of theboiler, either directly in. ordinary saturated steam locomotives, orthrough the intermediatitm ot a super-heater, 70, when a device of thatclass is applied, by branch steam pipes, (33, located within the smokebox, l, and lateral steam pipes, 65, eonnectcd, at their forward ends,to the lower ends of the branch steam pipes, 63, and ex- 7 shell of theboiler, 4, to the valve chests, 12*, of the high pressure cylinders, 12.v

in order to protectthe lateral steam pipes, ttf ti-om the cooling actionof the atinosphcre, they are incascd in lagging, of preferred material,and ball joint rings. (35", are titted between the ends of said pipesand the valve chest noz- Zlcs or tlanged openings to which they areconnected: llxpansion andcontraction of the pipes, 65, are compensatedby slip or expansion joints, (3.3". which are, preferably as shown,located adjacent to the high pressure valve chests.

It will be seen that by the above construction, the usual belt pipes aredispensed with, and connections cll'ected with a superheater or with thetrout T head of the main supply pipe as directly as is practicable. Thelateral steam pipes. (33, beneath and close to the boiler shell, do notobstruct the view ot the engineer, nor oll'er any obstruction to thereverse gear of the forward cylinders or any other moving members of thelocomotive.

I claim as my invention, and desire to secure by Letters atcnt:

t. In an articulated locomotive, the coincylinders liXcd relati\el tothe boiler. in rear ot the smoke box thereof. a main steam supply pipewithin the boiler, branch steam pipes communicab in; therewith. andextending downwardly in the smoke box of the boiler, and lateral steampipes extending rcarwardly adjacent to the boiler shell from the branchsteam pipes to the cylinders.

'2. In an articulated locomotive. the comnation of a boiler, cylinderslixed relatively to the boiler, in rear of the smoke box thereof, a mainsteam supply pipe within the boiler, branch steam pipes comnmnicatingtherewith and extending downwardly in the smoke box of the boiler,lateral steam pipes, extending rearwar-lly adjacent to the boiler shellfrom the branch pipes to the cylinders, and expansion joints in saidlateral steam pipes.

3. In an articulated locomotive, the comj bination of a boiler,cylinders fixed relatively to the boiler, in rear of the smoke boxthereof, a main steam supply pipe Within the boiler, a sgperheaterconnected thereto,

branch steam pipes communicating With said superheaterzand extendingdownwardly 16 in the smoke box of the boiler, and lateral steam pipesextending rearwardly adjacent

